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Messages - szabgab

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31
Xciting 250 / Re: Variator chatter
« on: April 20, 2018, 03:38:20 PM »
There is a LOT of gear backlash in that final drive! It is like a slack chain on a motorcycle. I am assuming the 250 is like the Agility, Yager, DT and People GTi300.

Karl, that"s good to know. I guess the engine and final drive will be most likely the same as other 250 and 300cc Kymco engines, basically a revamped Helix power plant...

What about the front shaft? I turned the engine around grabbing the front pulley, and it was relatively easy to turn (the two cylinder 400cc Honda I had was really hard to turn over by hand, but again the generator was bolted to the end of the crankshaft without any reduction, gears, etc) also I could detect free play in it of a half an inch or so...

32
Xciting 250 / Re: Variator chatter
« on: April 20, 2018, 12:32:40 AM »
Oh,  OK,  I will try that method.  BTW,  how much free movement shoulf be on the shafts?  I can most definitely move the clutch side (wheel)  shaft an inch or so side to side without movement in the wheel but also the variator shaft,  which is strange,  as I would have thought,  there should be absolutely no slack,  whatsoever...  Thanks!!

33
Xciting 250 / Re: Variator chatter
« on: April 19, 2018, 10:41:01 PM »
Hey, how are you? Good to hear from you! Yeah, I have an idea what may be your cause. De dee has a method of making sure the belt does not interfere with the front variation seating properly. I have a different method that does the same thing. His method does not require the rear pulley to be removed but takes patience and must be done in a sequence. What I think happened is the front nut was tightened against the belt and the pulley halves were not touching in the center. When the CVT started working the front pulley parts were loose!

Hey Karl! So nice of you to try to help with all my bloody ailments with this bike. Since we last spoke, the electrics were fried, well basically the battery died every week or so, first I thought it is the cold, turned out to be the alternator cables, where they escape the case were somewhat eaten away from engine movement, one broke of completely. Temporarily I have fixed it with soldering the cable back in (I could just about pull out a piece of the broken cable from the case with some long nose pliers) and RTV'd the hell out of the whole assembly for now (as the other yellow strands started to disintegrate badly). Eventually I will have the to take the alternator cover off and solder on some new cables, but I want to ride and not to f... around with this bike.

Belt wise - I had the same idea, but what I did was to losen the clutch side to the point, the belt was basically hanging between the rear and front pulleys, after that I have made sure, the variator pulley sides are actually touching rather than sitting on the sides of the belt. I still could be wrong, but after running the bike shortly I have tried to torque the variator nut again to make sure it is nice and snug, and it was. But please share your way of doing it, I'm known to be an idiot who tosses up a basic step, like forgetting to put back spacing washers and the likes :)))) What I did not try to put the variator pulleys on with the belt at first, torque it down and put the clutch side on. What I did instead was to put both sides on, loosening the clutch side, torquing the variator side, torquing the clutch side.

With my old Honda I nearly butchered a clutch, because the nut did not give (I am sorry to say, I sold it like that). I should have done it then, but I have acquired an impact wrench only now... Well at least I can take the variator apart as many times as I want :))))

34
Xciting 250 / Variator chatter
« on: April 19, 2018, 10:17:16 PM »
Dear all, finally I have gone round to replace the belt and the rollers, upon disassembly I have discovered, both the belt and the rollers are still OK, actually the belt I have measured in-situ completely wrong, and it is barely worn. Anyway, I have cleaned everything, sanded the clutch pads and the bell, cleaned the variator housing, ramps, replaced the rollers, put on the new (Xciting 250i spec) Mitsuboshi belt I have bought, everything is nice and cleaned. The clutch was catching on, chattering away and spinning the wheel ever so slightly before, but now this constant horrible chatter is coming from the variator side at idle completely overshadowing the mellow clutch chatter (that is still there). Also once the engine spins down from acceleration, the chatter gets rather loud for a second it to settle to this constant machine-gun fire mode. What did I do wrong?? Followed everything by the book, put the weights in the correct way, torqued everything to spec, even have taken the shebang apart three times since, trying to make sure, everything is spotless, etc. The belt is spinning the right direction.

I have made a video, sorry it being lousy, but my trouble is clearly audible, the chatter actually consists of three different layers, one is the (now) faint clutch chatter, some metallic noise and the loud chatter.



Any ideas?

Thanks folks!

Gab

35
Xciting 250 / Re: Steering bearing removal - replacement
« on: April 01, 2018, 09:35:06 PM »
or...  if topping up is a bad idea,  what about removing the damper rod bolt from the bottom, drain oil and fill up from top with fresh oil? I do have an impact wrench on loan,  so that might get the nut back on,  if it spins with hand tools? Or is this another lazy get-around,  that won't work?

36
Xciting 250 / Re: Steering bearing removal - replacement
« on: April 01, 2018, 08:07:37 AM »
  Changing the oil is a good way to stiffen up the fork ,  7.5 oil is from the factory ,  I put in # 10 , if you want to go stiffer go to # 15 oil,

Topping up the oil somewhat wouldn't achieve the same thing?  Or would I blow the seal? I guess a small amount should be sufficient 1oz or so...

37
Xciting 250 / Re: Steering bearing removal - replacement
« on: March 31, 2018, 02:29:11 PM »
BTW I have seen the user manual,  and the whole fork oil and seal replacement looked like a simplish operation,  but I have also read De dee`s description of the process,  and that looked like a lot of work.  Did anybody tried to simply remove the top caps and fill some fluid on top,  like 0.5-1dl to see,  if that helps with the ultra-soft suspension?

38
Xciting 250 / Re: Steering bearing removal - replacement
« on: March 30, 2018, 04:15:54 PM »
Get used to the "clunk" because two DT300I of the same year (2013) do exactly the same thing. No harm seems to happen from clunking over bumps. I only suspect what it might be. I am not curious enough to disassemble everything to find it!

Oh no, I was hoping this is just the bike being worn, or the oil broke down or something... Anyway, I will not tackle this thing now for sure, I had enough of the repairs for the time being (although there is a whole list of things to still do, belt replacement, valves, idle valve, etc etc)

39
Xciting 250 / Re: trying to remove front cover off xciting 250 2008
« on: March 30, 2018, 08:30:56 AM »
Hi Eric, welcome to the forum by an another newbie. The magnetic shutter is held on by a screw, but you can not access it, unless you remove quite a lot of body parts, same goes for the cover you try to remove. You don't have to tackle the inside front cover, but the front cowling instead. It is easy to do even with the windshield attached, a screw at the front above the headlight, two next to the dash (1 each side) and six (3 per side) lower down - 2 inside that vent thing and one underneath the rubber mat. Once the screws are off you can simply lift away the whole front, but be aware of the headlight and blinker connectors. You can download a very good service manual for the 500/250, it is for the carburated bikes, but most of it is the same. The one I could find quickly is the 500 service manual, again much is the same. Browse/download from here - https://www.manualslib.com/manual/1071123/Kymco-Xciting-500.html?page=2#manual

If you replace the fluid in the coolant reservoir, do not remove the overflow pipe, as stated in the manual, the rubber is most likely hardened by now and you will end up with a leak, like I did. If you can, try to siphon out the fluid from the reservoir instead (and you don't have to remove the lower side cover either)

Also whilst the cowl is off do yourself a favour, and replace/bleed the brake fluid too, the delay valve is located next to the coolant filler and if you decide to do the brakes later on, you have to remove the fairing again (but having the bike for a month I can take the cowl off on any dimly lit street with the supplied Kymco screwdriver in less than 5 minutes).

40
Xciting 250 / Re: Steering bearing removal - replacement
« on: March 28, 2018, 10:20:04 PM »
First three are over-engineering. Last one is simplest.

Thank you Karl... It took me three long hours to extract the race and another 20 minutes, to even out any ramps in the steering tube caused by the screwdriver digging in. If I would have had a welder and I would have known, what on earth I'm doing, I most definitely would have tried that method first. Also if one welds properly, the bead holds on, and indeed that gives you a shoulder to hammer away on :)

Anyway, the most important thing is, that the bike handles just so nicely, even sometimes too nicely, as it "falls" into corners (I guess not overly so, as the fork is not moving sideways, when the front wheel is test-held, does not judder at any speed and the 'hit the end of the bar with palm' method does not produce any unwanted vibrations either).

The only issue remaining in the front section is a clunk, when I hit bumps, I hoped, the steering bearing replacement will get rid of that, well, it did not do that completely. What I mean it is like heaving little suspension travel, and I hear-feel the road surface issues just a tad too much. At some point I will try to replace the fork fluids, but I'll leave the front be for now. BTW, does anybody know the correct amount of the fluid? I do not have a fork seal leak, but if the clunk is caused by little oil (suspension looks very soft to me, but mind you, I had an 80s touring-sports Honda before, which had stiff springs and large wheels), I might not get to far with measuring, how much oil comes out of there.

Thank you!

41
Xciting 250 / Re: Steering bearing removal - replacement
« on: March 27, 2018, 02:05:02 PM »
I hereby dub Gab an EXPERT REPAIR TECH of the First Order! Well, he is more than one up on me! De dee, too! Well, most of you guys and Nireen!

Karl,  you are ever so kind,  but I doubt an expert would have had to butcher that race as much as I did.  All I have is power tools and bravery :)

42
Xciting 250 / Re: Steering bearing removal - replacement
« on: March 26, 2018, 08:01:20 PM »
OK, job done and dusted and not a busted knuckle in sight. I'm just wondering, what waits to happen, job went so easy. Anyway, there were two things, that hold me up, one was the bottom race the other the installation of the stem race.

I have read the same goldwing docs, the hooked spanner and the modified large washer too, none of them worked for the bottom, there was no clearance whatsoever, so nothing to hook up things to. I cut the race diagonally with a diamond disc on a dremel, but I could not split it, as there was not enough space to cut it deep enough. So I ended up cutting channels on the top of the race left and right and modified an old screwdriver to have a very fine tip and a wedge. Hammered away at the two slits and once the screwdriver digged in, I was trying to hit the body of it, using the bottom of the tube as leverage. Needles to say, it didn't budge, so I heated up the tube with a torch locally, that finally helped. Once I got the race moving a bit, it was a lot easier to carry on, as now I had a slit all around, once I've ran out of the space on the screwdriver wedge I could just about hook in a bent threaded rod, that was filed down really narrow at the bottom. Another 20 minutes later the race popped away, the merriest sound ever - hearing the bloody thing ricocheting off the garage floor.

The stem race was easy enough to get rid of, I cut it with a diamond disc and split with a chisel, put the stem in the freezer for overnight and heated the new race up before putting it on. For some reason that was not enough as it was very tight and I kept hammering more and more desperately away on the bottom of the fork (it inverted and put in a vice, old race against the new).  Again heat helped, I torched the bearing race, this time nice and proper and finally I managed to seat it tight.  I stumbled once more, when I put the fork legs in when the top of the triple was already tightened down, fortunately I realised my mistake a bit later on, as the wheel axle was poking the wrong direction, e.g. 2-3 centimeters away from the opening of the other fork leg, SO I took that bit apart and set the legs with the axle screwed in as a guide.

Anyway, long story short the bike handles like a dream, I've got so used to this heavy-heavy steering the bike falls in the curves a little too fast :) I started to be happy again, so guess what, I have a coolant leak. How on earth???? Anyway, I will investigate, that will be nothing compared to the steam bearing replacement...

43
Xciting 250 / Re: Steering bearing removal - replacement
« on: March 25, 2018, 09:26:11 PM »
OK then...  I have taken a deep breath and gone in,  removed the steering,  nuts,  triple trees,  old bearing and the lower race from the triple,  which was easy.  Also the upper race on the top of the steering tube,  it protruded as De dee predicted.  Triple is in the freezer for the night it to shrink a tad.  So far so good,  but!  The race on the bottom of the steering tube is a real bitch,  it is not only not protruding or being flush with the rube,  but it is actually recessed deeper,  than the tube itself...  I will try to attach a picture...  How on the bloody earth I'm going to get it out???  I could try to drill the race or something,  but if it doesn't come out I'm f#cked, right? At the mo I do not know,  where the notches come from,  as the races were all smooth as far as I can tell,  and this one is fine too,  so I might just leave it in, but honestly I would like to change it,  if I'm this deep...  Any thoughts?

44
Xciting 250 / Re: Steering bearing removal - replacement
« on: March 25, 2018, 12:27:09 PM »
I strongly recommend getting a torque wrench.

I've had good luck with this one, and it's not much money: https://www.amazon.com/TEKTON-24330-8-Inch-ft-lb-13-6-108-5/dp/B00FMPKAD0/ref=sr_1_4?ie=UTF8&qid=1521933214&sr=8-4&keywords=torque+wrench+3%2F8

I also occasionally need to use a lighter 1/4 drive wrench, and rarely a 1/2 for high torque nuts. But that one is good for most applications.

I've learned to be paranoid using them; I've missed clicks before. Before you tighten something down, click it a bunch of times in the middle of its range on a high torque nut (that won't turn). I feel safer creeping up on most values... but not so slowly that it won't turn before clicking.

Yes,  I'm anal about things like that too,  the manual is full of values and I just keep on guessing.  I had rented one before and it was a godsend to know,  I'm doing things as the engineers intended,  no losening bolts or stripped threads.   

45
Xciting 250 / Re: Steering bearing removal - replacement
« on: March 25, 2018, 12:22:07 PM »
On my downtown  there was ,  I used  common  screw driver  with a long shank  no bend in it ,     and I used I,  t to tighten the caselated bolt  with a hammer  ,  no torque wrench  needed make it snug so it does not move up and down and does not bind the  steering,   

Good stuff,  all them Goldwings and big bore BMW`s has got the races recessed to the point it seems to be nearly impossible to drive them out. For the castellated nut I have bought a spanner,  I don't even know why,  but I was at the toy oh pardon tool shop and they had the proper size.  At least I know,  that is going to be the only nut not butchered :) From experience is that tightening method enough?  No binding,  no movement?  How does the bearing holds up after these years?


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